Operational Testing; Interface Specification - Tait TM8100 mobiles Service Manual

29.3

Operational Testing

29.4

Interface Specification

Figure 29.1 TMAA04-04 crossband linking cable
auxiliary connector
radio 1
TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
1. On the receiving radio, inject an on-channel RF signal at a level of
-70dBm, modulated to ±3kHz deviation (wide bandwidth channel)
or ±1.5kHz (narrow bandwidth channel), at 1kHz AF.
2. On the transmitting radio, the resulting deviation should be:
±3kHz (with a tolerance of ±200Hz) on a 25kHz wide
■
bandwidth channel.
±1.5kHz (with a tolerance of ±200Hz) on a 12.5kHz narrow
■
bandwidth channel.
The following table and diagram summarizes the signals used for the crossband
linking cable on the radios' auxiliary connectors and shows the interface
between the cable and the radios.
Table 29.7 Auxiliary connectors—pins and signals
Pin
2
B
J
C
7
1)
D
1!
E
1@ 12
F
1#
G
1$
13
H
1%
I
15
rear view
crossband linking board
Signal name
AUX_GPIO5
busy (output)
AUD_TAP_IN
audio tap input
AUX_GPI1
PTT (input)
AUD_TAP_OUT
audio tap output
AGND
analogue ground
TMAA04-04 Crossband Linking Cable
auxiliary connector
radio 2
Description
575